EP 2337376 A1 20110622 - LOOP GAIN ESTIMATING APPARATUS AND HOWLING PREVENTING APPARATUS
Title (en)
LOOP GAIN ESTIMATING APPARATUS AND HOWLING PREVENTING APPARATUS
Title (de)
VORRICHTUNG ZUR MESSUNG EINER REGELKREISVERSTÄRKUNG UND VORRICHTUNG ZUR RÜCKKOPPLUNGSVERHINDERUNG
Title (fr)
APPAREIL D'ESTIMATION DE GAIN DE BOUCLE ET APPAREIL ANTI-SIFFLEMENT
Publication
Application
Priority
- JP 2009066558 W 20090924
- JP 2008244700 A 20080924
- JP 2008299588 A 20081125
- JP 2008333608 A 20081226
- JP 2009094696 A 20090409
- JP 2009094697 A 20090409
- JP 2009208285 A 20090909
Abstract (en)
A pseudo noise superimposing unit superimposes a pseudo noise (M-sequence) to an audio signal picked up by a microphone and outputs the superimposed signal to an amplifying system. An calculating unit calculates a correlation value between the audio signal picked up by the microphone and the pseudo noise. The calculating unit estimates a gain of a closed loop based on the correlation value. A gain control unit suppresses a gain of the audio signal based on the estimated gain of the closed loop.
IPC 8 full level
H04R 3/02 (2006.01)
CPC (source: EP US)
H04R 3/02 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2337376 A1 20110622; EP 2337376 A4 20140226; CN 102165792 A 20110824; US 2011182439 A1 20110728; US 8917885 B2 20141223; WO 2010035760 A1 20100401
DOCDB simple family (application)
EP 09816175 A 20090924; CN 200980137608 A 20090924; JP 2009066558 W 20090924; US 200913120885 A 20090924